#include <stdio.h>
#include <stdlib.h>

int main ()
{

    int* a = (int*) calloc (4 , sizeof (int)) ;

    for (int i = 0 ; i < 4 ; i++)
    {

        printf ("%d " , a[i]) ;

    }

    free (a) ;

    a = NULL ;

    return 0 ;

}